Radiocarbon dating was performed for the extracted organic fractions (cellulose-rich and humic acid fractions of plant fragment; fulvic acid, humic acid and humin fractions of humus substance) and shell from core sediments of the Erhai Lake, SW China. The 14C dating results reveal that there are considerable differences, but there apparently is a humic acid ≤ humin < fulvic acid fraction sequen...

Doctoral Dissertations Suported Wholly or in Part bv DOE During this Proiect Period D 1. "Fluorescence Lifetime Characterization of Bacteria using Total Lifetime Distribution Analysis", Amy E. Kinkennon, 1997. "Fluorescence Probe Studies of Humic Substance Standard Materials", Jarafshan Mobed Mistry, 1998. "Spectroscopic and Thermal Investigations of Short, Single-Stranded Nucleic Acid Ligands"...

A Centro de Estudios Trandisciplinarios del Agua, Facultad de Ciencias Veterinarias, Universidad de Buenos Aires. Av. Chorroarín 280 (C1427CWO), Ciudad de Buenos Aires, Argentina. B Centro de Formación e Investigación en Enseñanza de las Ciencias (CEFIEC), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II (C1428EGA) Ciudad de Buenos Aires, ...

The density of humic acids and humic like substances (HULIS) from fresh and aged wood burning and pollution aerosol particles E. Dinar, T. F. Mentel, and Y. Rudich Department of Environmental Sciences, Weizmann Institute of Science, Rehovot 76100, Israel Institute for Tropospheric Chemistry, Research Center Jülich, Jülich, Germany Received: 25 July 2006 – Accepted: 7 August 2006 – Published: 11...

Humic acid (HA) is a kind of organic substance that has shown good effects in regard to promoting crop growth. In the current study, influences three kinds fertilizers mainly containing humic/fulvic acids, including water-soluble fertilizer humic (WHA), fulvic potassium (FAP), and distillate (FAD), on qualities ‘Eureka’ lemon fruits were investigated systematically at their different harvest ti...

ABSTRACT- In the past few decades, accumulation of heavy metals, such as lead (Pb), in soils has increased as a result of human activities.The environmental hazard associated with soil enrichment in heavy metals is related to their mobility and plant availability. Application of various materials such as humic may influence the amount of Pb taken up by plant. Four levels of each of liquid and s...